Steam-turbine valve.



E. H. WERZNER.

STEAM TURBINE VALVE. APPLICATION msn APR. 17. 1911,

Patented sept. 25,1917.

4 if Hmm 'WQ MMM-gm `UNITED STATESl PATENT FFQE. a

EDWARD I-I. WERZNER, OF EVANSVILLE, INDIANA,` ASSIGNOR TO SOHROEDR HEAD- LIGHT C0., INC., OF EVANSVILLLE,

INDIANA, `A CORPORATION OF INDIANA.

STEAM-TURBINE AVALVE.

To all 'whom t may concern:

Be it known that I, EDWARD I-I.'IVVERzNER, a citizen of thev United States, and a resident of Evansville, in the county of Vander# burg and State of Indiana, have invented anew and Improved Steam-Turbine Valve,

of which the following is al full, clear, and

exact description.

This invention relates to the inlet valve of 'a'turbine, and the invention has for its general objects to provide a valve which is reliable and efficient in use and so de# signed that it will be extremely sensitive to the action vof the governor.

A more specific object of the invention is to provide a novel form of balanced valve whereby it can be easily moved by a centrifugalspeed device or governor, `so that fluctuation in speeds will be minimized.

With such objects in view, and others which will appear asthe description'proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.`

Inv the accompanying ;,drawing, which illustrates one embodiment lof the invention and wherein similar characters of reference indicate corresponding parts in all the views,

Figure 1 is a longitudinal section of the valve mechanism taken on the axial plane of the valve; s

Fig. 2 is a sectional view on the line 2 2, Fig. 1; and

Fig. 3 is a transverse section on the line e-a rig. 2.

Referring to the drawing, A designates the frame of the turbine which has a portion 1 that forms the housing for the valve, such portion 1 being provided with a supply passage 2, Fig. 2, and a delivery passage 3 that conducts the steam to the turbine nozzle. In the portion or walls 1 is a tapering hole 4 in which is fitted the conical casing or valve body 5. This valve body 5 has cored therein chambers 6 and 7 connected by a port 8 through which steam asses from the chamber 6 to the chamber 7) Surrounding` the valve body is an annular groove 9 which communicates with the inlet passage 2, and the wall of the valve body at vthe groove 9 is provided with a Specification of Letters Patent.

' body has a solid portion 11 directlycin line with ythe-inlet passagey 2, asv shown 'in Fig.

Patented Sept. 25, 1917. Application led April 17, 1917.` Serial No. 162,657.- i

3, so that the incoming steamy flows iny the groove 9 in opposite directions around the valve body to enter the ports 10. The chamber 7 communicates with the passage 3 for conducting the main supply of steam to the turbine. In the body 5 is a valve 12y which has a conical shoulder 13 that is adapted tocoperate with the 'seat 14 to'control the' amount of steam iowingto the turbine.

The valve 12 is connected with a stem 15' which passes axially through thebody 5, therebeing a stufhng box 16 for preventing leakage `of steam' aroundl the valve stem. The outer end of the valve stem is connected with a governor lever 17 whereby the valve is reciprocated.

At the inner end of the valve body 5 is a piston chamber 18 formedy bya chambered plug 19 screwed into the body 5. The said. body' has a short passage 20 whereby the chamber 6 communicates'with the chamber 18, and in the chamber 18 is a piston 21 which is formed with a conical shoulder Y22 adapted to bear on the seat`23 aty one end of' the passage 20. The diameters of the valve 12 and of the piston 21 are slightly less than the diameters of the passages 20 and chamber 18, respectively, so that a restricted conduit will be formed when the shoulder 22 is o the seat 23 for the flow of steam into the chamber 18, whereby a pressure will be exerted on the piston 21 to counterbalance the pressure of the steam on the conical shoulder 22 of the valve. The plug 19 has a restricted aperture 23 which allows the balancing steam to escape into the passage 3, as clearly shown in Fig. 2. As soon as the valve is thus balanced it can move freely and is sensitive to the slightest motions of the governor lever 17.

From the foregoing description taken in connection with the accompanying drawing. the advantages of the construction and method of operation will be vreadily understood by those skilled in the art to which the invention appertains, and while I 'have described the principle of operation, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device 'pio shown isy merely` illfustrative and that such changes may be'inade when desired as fall within the scopeof the appended claims.

Having? thu'sldescribed my invention, I claim ars-new andv desire to secure by Letters Patent:

1. A turbine structure including an inlet passage for the [iuid and a delivery passage for conducting the-*fluidi toa nozzle, and a valve device between the passages, said de vice comprising abody having connected chambers,` the' passage ysurrounding the lbody and communicating, with. the inlet passage, ports vbetween the surrounding. ,passage and# o neof the chambers, avvalve-infthe' body for controllin-g communication between the chamloersfa third. chamber having a `restricted. communication with. the :delivery passages, avv piston connected with the valve and disposed in and spaced fromy the-walls of the last-mentioned chamber', and a seat l .with which: the piston cooperates to control thefiow of Huid into the piston chamber to act. onthe piston and balancevthe pressure onl the valve.-l

2. Av valve devicecomprising a. structurey formedwith', a tapering holeand having an inlet` passage .and l.a delivery. passage, va tapering. body disposed 1n -saidhole and formed with: an. intermediate chamber and` two .outer chambers, one of the outer cham# .y bers. having a. free communication-with the delivery' .passage andthe other a restricted communication, means connecting the inlet Aassafe with the intermediate chamber portedf walls between the intermediate'xand outer. chambersqand havingvseats, avalve in I the intermediatechamber-and formed with a shoulder to engage. one of the seats, az piston Copies oi this'patent may. be obtainedztor .ve cents each, by. addressing the Commissioner of Patents;

,pressurey on. the valve:

connected with the valve and disposed in and spaced from the walls of the chamber having a restricted communication with the delivery passage, the piston being' formed with a shoulder toengage the other valve seat, a stem connected with the valve and passing through they chamber having the free communication -with the delivery passage andv extending out of the body, and. a governor-actuated device connected with the valve stem, said intermediate chamber having restricted communication` with the'pistton `chamber to admit fluidninto the latter for acting on the piston to balance the. fluid .3Q A valvev device of the class described comprising astructure formed with a chamber and a'n inlet passage anda delivery passage, a body fitted in the said:` chamber and formed withva chamber in communication with the inlet passage and anotherwchainv ber having free communicationv with the delivery passage, a ported. wall between said? chambers and formed. with a valve seat, ,a valve in the.l first-named chamber and adapted to engage the sa1dseat,.a stem cennected with the valve and extending axiallythrough theI body, a chamber-ed plug. inthe. body, a ported wall between the .chamber of the plug andthe first+namedachamber,. and a piston in the cha'mbered plugand of such size as topermit a limited amount of fluid. toenterl the chambered plug when the valve is open, said. plug having a restricted port.

cor.

whereby thefchamber .of the` plug communi-- cates with the. deliver-y passage, said `plug being removable to permit the valve and pisy ton and stemeto be removed from said body.

EDWARD H. ERZNER,

Washington, D. C. 

